Interpretation of the IR spectra of aluminum, gallium, and indium tris(acetylacetonates)

Slabzhennikov, S. N.; Ryabchenko, O. B.; Kuarton, L. A.

doi:10.1134/s1070328406080021

Cited by 14 publications

(11 citation statements)

References 9 publications

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“…The results confirm that Hacac adsorbs on Al 2 O 3 , as indicated by the absorption peaks in the wavenumber range 1300–1650 cm –1 . 26 , 27 Subsequent dosing of BDEAS precursor causes only a minor change in the spectrum, which confirms that the preadsorbed Hacac molecules act as inhibitors and block the impinging BDEAS molecules from chemisorbing onto the Al 2 O 3 surface. It is estimated that the minor change corresponds to a fraction of ∼8% of the amount of BDEAS molecules adsorbed on bare Al 2 O 3 .…”

Section: Results and Discussionmentioning

confidence: 73%

Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

et al. 2017

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Area-selective atomic layer deposition (ALD) is rapidly gaining interest because of its potential application in self-aligned fabrication schemes for next-generation nanoelectronics. Here, we introduce an approach for area-selective ALD that relies on the use of chemoselective inhibitor molecules in a three-step (ABC-type) ALD cycle. A process for area-selective ALD of SiO2 was developed comprising acetylacetone inhibitor (step A), bis(diethylamino)silane precursor (step B), and O2 plasma reactant (step C) pulses. Our results show that this process allows for selective deposition of SiO2 on GeO2, SiNx, SiO2, and WO3, in the presence of Al2O3, TiO2, and HfO2 surfaces. In situ Fourier transform infrared spectroscopy experiments and density functional theory calculations underline that the selectivity of the approach stems from the chemoselective adsorption of the inhibitor. The selectivity between different oxide starting surfaces and the compatibility with plasma-assisted or ozone-based ALD are distinct features of this approach. Furthermore, the approach offers the opportunity of tuning the substrate-selectivity by proper selection of inhibitor molecules.

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Section: Results and Discussionmentioning

confidence: 73%

Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

et al. 2017

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“…3(a)], two characteristic absorption bands at 1597 and 1532 cm À1 are assigned to the C = O stretching vibrations of acetylacetonate moieties bounded to aluminum atoms as bidentate ligand. 8 These bands disappear when Al(acac) 3 is added to the RF mixture. Moreover, a sharp absorption band located at 1691 cm À1 , which implies the presence of ketonic molecule of acetylacetone as monodentate ligand, 9 appears [see Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the IR spectra of pure Al(acac) 3 [Fig. (a)], two characteristic absorption bands at 1597 and 1532 cm −1 are assigned to the C = O stretching vibrations of acetylacetonate moieties bounded to aluminum atoms as bidentate ligand . These bands disappear when Al(acac) 3 is added to the RF mixture.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Porous Alumina Assisted by Resorcinol–Formaldehyde Gel

Chantam

Pavarajarn

2012

J. Am. Ceram. Soc.

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Porous alumina with interconnected structure is synthesized by a simple approach assisted by a polycondensation of resorcinol–formaldehyde (RF) mixture. The results show significant increase in surface area because of the porous network of the RF gel and the effectiveness of the RF gel in retarding growth of alumina grains during calcination. The product obtained has the surface area of 68 m2/g even after the calcination at 1200°C to convert it to α‐alumina, whereas the surface area of the product prepared without the RF gel is only 10 m2/g. Nevertheless, the process is not direct templating technique since the interaction between the precursor of alumina, i.e., aluminum acetylacetonate (Al(acac)3), and the RF mixture occurs and alters the gel structure. The formation of alumina clusters via the sol‐gel process takes place as the network of RF gel is progressively formed.

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“…The formation of a three-dimensional network of a hydrogel is potentially associated with the creation of metal-coordination bonds between aluminum ions and carbonyl, carboxyl, and ether group of the copolymers [20], which was confirmed by ATR-FTIR (Nicolet iS5, Thermo Fisher Scientific, MA, USA). Furthermore, to prove the crosslinking mechanism of the metal-coordination complex, strong acid (1 N HCl) and strong base (1 N NaOH) solutions were separately added to the PVPAA/PMVEMA [21].…”

Section: Metal-coordination Complex Formation Of the Hydrogel Psasmentioning

confidence: 87%

“…Moreover, Figure 6 shows the ATR-FTIR spectra of the PVPAA/ PMVEMA in acid and base conditions. A broad peak of Al-O stretching of the metal-coordination complex of PVPAA/PMVEMA in the acid condition was exhibited at 544.6 cm −1 [20], indicating that the coordination complexes of the hydrogel patches were maintained in the acid condition. However, the Al-O stretching peaks in the spectrum of the PVPAA/PMVEMA disappeared after the patches were submerged in a strong base, and the three-dimension networks of the hydrogels were deformed.…”

Section: Preparation and Metal-coordination Complex Formation Of The Pvpaa/pmvema Psasmentioning

confidence: 98%

Development and Evaluation of Novel Water-Based Drug-in-Adhesive Patches for the Transdermal Delivery of Ketoprofen

et al. 2021

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The objective of this study was to develop novel water-based drug-in-adhesive pressure-sensitive adhesives (PSAs) patches for the transdermal delivery of ketoprofen, employing poly(N-vinylpyrrolidone-co-acrylic acid) copolymer (PVPAA) and poly(methyl vinyl ether-alt-maleic anhydride) (PMVEMA) as the main components. The polymers were crosslinked with tartaric acid and dihydroxyaluminium aminoacetate using various polymer ratios. Ketoprofen was incorporated into the PVPAA/PMVEMA PSAs during the patch preparation. The physicochemical properties, adhesive properties, drug content, release profile, and skin permeation of the patches were examined. Moreover, the in vivo skin irritation and skin adhesion performance in human volunteers were evaluated. The patches prepared at a weight ratio of PVPAA/PMVEMA of 1:1 presented the highest tacking strength, with desirable peeling characteristics. The ketoprofen-loaded PVPAA/PMVEMA patches exhibited superior adhesive properties, compared to the commercial patches, because the former showed an appropriate crosslinking and hydrating status with the aid of a metal coordination complex. Besides, the permeated flux of ketoprofen through the porcine skin of the ketoprofen-loaded PVPAA/PMVEMA patches (4.77 ± 1.00 µg/cm2/h) was comparable to that of the commercial patch (4.33 ± 0.80 µg/cm2/h). In human studies, the PVPAA/PMVEMA patches exhibited a better skin adhesion performance, compared with the commercial patches, without skin irritation. In addition, the patches were stable for 6 months. Therefore, these novel water-based PSAs may be a potential adhesive for preparing drug-in-adhesive patches.

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Interpretation of the IR spectra of aluminum, gallium, and indium tris(acetylacetonates)

Cited by 14 publications

References 9 publications

Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

Synthesis of Porous Alumina Assisted by Resorcinol–Formaldehyde Gel

Development and Evaluation of Novel Water-Based Drug-in-Adhesive Patches for the Transdermal Delivery of Ketoprofen

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Interpretation of the IR spectra of aluminum, gallium, and indium tris(acetylacetonates)

Cited by 14 publications

References 9 publications

Area-Selective Atomic Layer Deposition of SiO2 Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

Area-Selective Atomic Layer Deposition of SiO2 Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

Synthesis of Porous Alumina Assisted by Resorcinol–Formaldehyde Gel

Development and Evaluation of Novel Water-Based Drug-in-Adhesive Patches for the Transdermal Delivery of Ketoprofen

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Product

Resources

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Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle

Area-Selective Atomic Layer Deposition of SiO₂ Using Acetylacetone as a Chemoselective Inhibitor in an ABC-Type Cycle